Haeold binks



H. BINKS.

'CARBURETER FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED AUG.6 I917.

Patented Jul 8, 1919.

p, UNITED STATES PATENT OFFICE.

HAROLD IBINKS OF ECCLES, ENGLAND.

GARBURETER FOR INTERNAL-COMBUSTION ENGINES.

Specification of Letters Patent.

Patented July 8, 1919.

Application filed August 6, 1917. Serial No. 184,665.

To all whom it may concern: v Be it known that I, HAROLD BINKS, a subject of the King of Great Britain, residing at 67 Snowdon road, Eccles,in the county of Lancaster, England, have invented certain new anduseful Improvements in Carbureters for Internal-Combustion Engines, ofwhich the following is a specification. r

This invention relates to carbureters for internal combustion engines;and it consists in the novel construction and combination of the, partshereinafter fully described and claimed.

In the drawings, Figure 1 is a vertical longitudinal section through acarbureter constructed according to this invention.

Fig. 2 is a plan view of the throttle piston valve. Fig. 3 is across-section throughthe throttle piston valve, taken in section on theline III-III in" Fig. 1, and showing also portions of the casing of thecarburetor.

The casing 50 of the carbureter is provided with an induction passage 5which is connected to the engine cylinder. An-inlet passage 37 isarranged in line with the passage 5, and is connected with the air inletpipe 27 which is preferably swiveled in the casing 50. V The hydrocarbonfuel is supplied from an y suitable reservoir through a pipe.

or passage 52.

A cylinder 29 for the throttle piston valve 6 is formed in the casing50, and a second cylinder 11 for the piston 10 of the main fuel supplyvalve 15 is also formed in the casing 50, and is arranged on theopposite side of the cylinder 29 from the passage 5, and parallel to thesaid cylinder. The casing 50 has passages 18 which connect the fuelsupply passage 52 with a chamber 53. This chamber 53 is formed in oneend por tion of the cylinder 29 by means of a plate or head 32 which issecured in the said cylinder.

The main fuel supply valve seat 54 is secured in the casing 50, and isconnected with the fuel passages 18 by a chamber 55. The valve seat 54:is provided with a perforated tube 16 which extends across a choke tube9 secured in the inlet passage 37. The valve seat preferably has ascrewthreaded portion 54' which is screwed into a hole in the casing atthe end of the chamber 55, so as to secure the valve seat, and the choketube is smaller in diameter internally .at its middle part, where thevalve seat is arranged, than at its ends.

. Thema-in fuel inlet valve 15 is preferably a needle valve. One end ofit is secured in the piston 10 which slides in the cylinder 11, andaspring12. is providedwhich normally closes the. needle valve. A guideslot 14 is formed longitudinally in the casing 50 between the cylinders29 and 11, and 13is a projection on the piston 10-which slides in thesaid guide slot. The piston valve 6 is operated positively'by means of arod 26, and any suitable valve gearing, and it has a projection ortappet 8 which also works in the slot 14 and is arranged in the path ofthe tappet or projection 13, and thereby aifords a means for operatingthe main fuel valve 15.

Two pilot j ets-3 and 4; for fuel are preferably provided. These pilotjets are both alike, and they are secured in the plate 32. One end ofeach jet is constantly in communication with the fuel supply chamber 53.This chamber 53 is closed by a cap 21. A strainer frame 19 is arrangedin the chamber 53, and is held in place by a spring 20. This frame .19is used to support a strainer fabric of fine wire gauze, which isindicated by the dotted line, but this strainer is not a novel feature.r r r r ,-The throttle piston valve 6 has two holes 63 and 64 formedlongitudinally in it, and which slide over the two pilot jets 3 and 4t,and plugs or valve seats 7 of soft material, such as leather or lead,are arranged in counterbored holes or extensions of the holes 63 and 64.When the piston valve is moved to the right in Fig. 1 these plugs closethe outlets of the pilot jets. Two cross holes or passages 23 and 30 areformed crosswise of the holes 63 and 64 and are arranged at dif ferentdistances from the end of the piston valve 6. When the piston valve 6 ismoved to the extreme right, as shown in Fig. 1, these holes 23 and 30are both out of communication with the passages 37 and 5.

When the piston valve 6 is moved to the left in Fig. 1, the hole 23first connects the passages 37 and 5, and permits some fuel to be drawnfrom the jet 3 into the engine cylinder with the air. The hole 30 isthen placed in communication with the passages 37 and 5 so that anadditional supply of fuel is admitted from the pilot jet 4. Theprojection or tap et 8 on the piston valve 6 subsequently stri es theprojection 13 and thereby opens the main fuel valve and admits the mainsupply of fuel to the engine cylinder after the piston valve has uncovered the passages 37 and .5.

Two pilot jets and one main jet are pref erably provided, but the numberof these jets may be varied to any desired extent in carrying out thisinvention.

The plugs 7 may be omitted if desired, as

when the piston valve is moved to the right so that the holes orpassages 23 and are covered, the pilot jets are relieved of the suctionof the engine cylinder, and the level of the liquid fuel in the passages'18 falls below the chamber 55.

'A relief valve 17 is preferably provided to admit air to scavenge theenginecylinder through ports 65 and 66 which are placed in communicationwith ,each other and the passage 5, but this valve 'is not novel and maybe dispensed with. A spring 17' is provided for holding the valve 17 ina position to close the ports 65 and .66, and a rod or wire 17 isprovided for operating the valve 17 so as to establish a communicationbetween these ports. A port 22 may also be provided to admit air to thepassage 5 by way of the cylinder 29 when the piston valve 6 is moved tothe left. This port 22 is normally closed by a slidable plate 31. 'Theplate 31 is moved by hand to admit air to dilute the richness of thecombustible mixture as occasion may require, but this device is not anovel feature of the present invention.

What I claim is: i

1. In a carburetor, a casing provided with a cylinder and havin inletpassages connected with the cylinc er, athrottle piston Copies of thispatent may be obtained for valve working in the cylinder between thesaid passages, a pilot jet for fuel projecting mto the said cylinder andcontrolled by the said p ston valve, a main valve for admitting fuel toone of the said passages, means vfor vclosing the said main valveautomati-' between them, said casing having also inlet passagesconnected with the throttle valve cylinder, a piston valve working inthe throttle valve cylinder and provided with a projection which slidesin the said slot, a pilot jet for fuel projecting into the throttlevalve cylinder and controlled by the said I piston valve, a main valvefor admitting fuel to one'of the sai'd inlet passages, and a pistonconnected-to the said main valve and sliding n the second saldcyhnderandprov ded with a projection arranged in thesaid slot in thepath of the projection on the throttle piston valve.

In testimony whereof I aflix my signature in the presence of twowitnesses;

HAROLD BINKS. 'Witnesses N P 'MQ LEY, .G Q E W V R,-

five cents eaeh, by addressin g the Commissioner of Patents,

Washington, D. 0.

